'Downton Abbey' stars: Out of costume

March 21, 2013 |By VANESSA HO

Ian Gavan/Getty Images

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Check out O'Brien (Siobhan Finneran, second from left) in the red dress! She's with fellow actors Lesley Nicol (left), Laura Carmichael and Thomas Barrow (right) at London's National Television Awards in 2012.

Ian Gavan/Getty Images

20of43

Check out O'Brien (Siobhan Finneran, second from left) in the red dress! She's with fellow actors Lesley Nicol (left), Laura Carmichael and Thomas Barrow (right) at London's National Television Awards in 2012.